Repeater system



- May. 22,192 1,455,957

' I E. D. JOHNSON REPEATER SYSTEM Filed Jan. 18 1918 Muen/ar: Edgar 0. Johnsan Patented May 22, 192.3.

UNITED STATES PATENT OFFIQE...

EDGAR D. JOHNSON, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO WESTERN ELEC-- TRIO COMPANY, INCOR1OR.C-.TED, OF N W YORK, N. 11, A CORPORATION OF NEW YORK.

BEPEATER SYSTEIVL Application filed January 18, 1913.

To all 20 7mm it may concern 7 Be it known that I, Encarta). JOHNSON,

a citizen of the United States, residi at East Orange, 111 the county of lies T, State by providing avoice-operated relay for each of the two line terminals or sections, the operation of either relay. in response to current impressed on its corresponding line section. serving not only to connect the repeater properly in circuit but also to change the connections of the other control relay so that these relays will assist each other in maintaining the repeater properly connected. The assistance of the second or subsequently operated relay is of material advantage, for this second relay in the embodiment chosen to illustrate the invention and its various aspects, is connected in the output circuit of the repeater and accordingly energized by amplified current, whereas the relay initially operated is in the input circuit of the repeater and is actuated by the comparatively feeble incoming current.

This will be described further in detail in connection with the drawings, in which the figurerepresents diagrammatically one embodiment of the invention.

Referring to the drawings, the repeater 1, here shown as of the mechanical type. but obviously any other type may be employed, is adapted to be reversibly connected to the line sections or the terminals 2 and 3, the electromagnetic switches 4, 5, 6 and 7 being employed to connect the repeater in such manners that the two-way transmission of signals between the lines 2 and 3 is provided. The operation of the switches 4, 5, 6 and 7 is controlled by the intermediate relays 8, 9, and the latter are in turn controlled by the Serial No. 212,462.

control relays such as voice relays 10 and 11. The voice relays 10 and 11 are responsive to alternating or pulsating current, such as voice current, to cause the vibration of their normally closed contacts 12 and 13 respectively. The invention is not limited to any particular form of voice relay, and as indicating one type of control relay that may be employed, reference is made to the patent to Brown, 1,185,472, telephony, May 80,1916.

The solenoid of the voice relay 10 nor mally, that is, when no current is impressed on the line, is connected to the line 2 through armature 41, lead 42, arinatlu'c 423-, rcay l0, armature 61, lead 62 and armature 63. The armatures 41 and 43 are held in contact with the lead 42 by reason of the fact that the circuit otthe solenoid oi the switch 4 is completed through ground, battery 44, solenoid of switch 4, lead 14, armature 1.5 of relay 8, lead 16, closed contacts 13 of relay 11 and armature 17 of relay 9 to ground. The energizing circuit for the switch 6 may be traced from ground to battery 64, sole noid of switch 6 to point A. lilnergizing circuit of relay 8 may also be traced in part to this point A from the ground through battery 21 and through the solenoid of relay 8. The ener izing circuit or switch 0 may also be traced to this point A from ground,

battery 54 and through the solenoid switch 5. The switches 5 and 6 and the relay 8 are all connected to this point A, from which the circuit leads through armature 18 of relay 9, lead 19, closed contact 12 of relay 10 and armature 20 of relay 8 to ground. The battery circuits for switches 4 and T and .tor the relay 9 may be readily traced to the point B, from which the circuits extend as has already been traced for the switch 4 through armature 15 ol relay 8, lead 16, contacts 13 of relay 1.1. and armature 17 of relay 9 to ground.

li hcn no current is iiuprl-issedou the lines ul 3. the voice relays 10 and 11 are deiced and the solenoid of each of these :luded in circuit with its corru- ,Llllg' line or line section. Furthermore the repeater is entirely disconnected from both oithe lines 2 and 3 as shown in tnc switch 5 connects the out 'nitcircuitjof repeater 1 in series with the line3 and with i the solenoid of voicei-elay11 which is thereby energized by. amplified voice currents, Deenergization of the relayS has moved armature 15 to its alternate position, thereby connecting the point B to ground through the armature 15.

This serves to remove the controlof switches 4 and 7 and relay 9 from the voice relay 11. The dcenergization otthe relay 8 also moves armature 20 to its alternate position, this servingto connect the contacts 12 of relay 10, and 13 0'1": rela 11 in eries between the groundand the point A oven the following circuitggroiuid to armature 17, contact 13, armature 20, jcontact, 12,

armaturelS to point A, from which the circuit extendsto the deenergized switches 5 and 6 and the deenergized relay 8, these latter three being maintained eilectively deenergized by reason of the fact that the vibratingcontacts 12 and 12 are assisting each other, being connected in series. The operation of theco ntactwll is of material assistance, since the voice relay 11 is energized by amplified current derived tom the output circuitrepeater 1, whereas the initi ally operated. relay .10 is controlled by the comparatively teeble voice current comii'ig .over the line 2. i

Upon the cessation of current one-mating in line 2, the contacts 12 and 13 become quiescent, thereby decreasing the resistance in the circuit which extends from groundthrough armature 17, contact 13, lead 16,,

armature 20, contact 12, lead 19, armature 18 to point A, from which the circuit extends through the switches 5 and 6 and the relay 8. This decrease in the resistance between the point A. and the ground, serves to suiiiciently energize the switches 5 and 6 and relay 8 so that they attract their armatures to their normal positions shown in the drawing.

Relays 8 and 9 preferably have maltebreal; contacts and are quicker in their operation than switches or relays 4:, 5, 6

p and 7.

Since the circuits are symmetrical as seen from lines 2 and switches 4t and 6 and relays 8. and 10 being similar to the corre-w spending elements associated with the line 3, it is apparent that the operation of these devices as to current originating in line 3 will be similar to that above described.

What is claimed is:

1. The combination of a line,a repeater adapted to be reversibly connected thereto, a relay for controlling the connection of said repeater to said line, and means comprising arelay and a vibratile contact controlled thereby whereby current derived from the output circuit of said repeater. is effective to control the repeater connections.

2. The combination of a line, two relays therefor, contacts for each. of said relays, and means for rendering said contacts at times independent and at othertimes cooperating. i v V 3. The combination of a line, two relays therefor, contacts for each of said relays, and means for causing said contacts t'o be at times included in independent electrical circuits and at other times in series in the same circuit. I 4. In combmation wlth a hne, two voiceoperated relays therefor, each havmgayn tacts in independent circuits whenfsaidrebrating contact, means connecting said con lays are decnergized, and means responsive T to the energlzatlon of e ther of sald relays.

tor causing said contacts to be connected in series.

5. A line, a repeater the1',efor,tw relays for controlling the connectloirof said repeater to said line, and means, for causing said relays to operate at timesindependently and at other tunes cooperatively.

6. A two-way repeating-system compr1sing a line, a repeater therefor, two: voice-:

operated. relays forcontrolling the-conned. tion of said repeater to said line, and means for causing; saidrelays to operate independ- I.

cntly at times and cooperativelyat other tunes. .1 I 7. In a telephone system, the combination ot a line, a repeatertherefor, a relay-comprising a solenoid and an armature for con trolling the connections of said repeater to said line, and. means comprising an armature .movahle independently; of said first mentioned armature whereby. current derived 1 from the output circuit. 01": said repeaterftis effective to assist said relay in controlling the repeater connections.

8. The combination oi'ftwo lines, are peater adapted to be connected therebetiveen, i

a relay .lGSl'lOllSl'iG to current approaching the input of the repeater, automatically (llSCODIliXillLfi? circuit of said repeat'enw- 9. A line, a repeater, a relay ling the COnIleCtlOHS"10f said line to said repea .r. and meansrrresponsivefJtoLcurrent impressed on said lines for connecting said said repeater ni'or controlling: connections, and 'means for. connecting; 1 said relay to or said relay from theoutput" for control-l I ise relay to the output circuit 0% said repeater for transmission in one direction, and to the input circuit thereof for transmission in another direction.

10. A two-way repeating system comprising two lines, a repeater normally operatively disconnected therefrom, a voice-operated relay normally connected to each of said lines, the energization of either of said relays serving to connect said repeater to said lines for transmission in the proper direction and to connect the other relay for assisting the relay initially operated.

11. A two-way repeating system comprising two lines, repeater therefor, a voiceoperated relay for each oi said lines, and connections whereby each of said relays respond to impulses coming in over its line to establish the repeater connections and whereby both of said relays maintain the repeater connections.

12. A two-way repeating system comprising two lines, a repeater, reversing switching means between said repeater and said lines, two voice-operated relays, each having a vibrating contact for controlling said switching means, said contacts being in independent circuits when said relays are deenergized, the energization of either of said relays serving to connect one of said relays to the input circuit, the'other to the output circuit of said repeater (b) to connect said vibrating. contacts in series, and (0) to con-' nect said repeater to said lines for transmission in the proper direction.

13. A. line comprising two sections, a repeater adapted to be reversibly connected thereto, avoice-operated relay for each of said line sections for reversibly connecting said repeater to said line, and connections whereby one of said relays is operated by current derived from the output circuit of said repeater.

1 1. A line, a repeater, a relay for controlling the connections of said line to said repeater, and means comprising a vibratile contact responsive to current impressed on said lines for connecting said relay to be energized by current from the output circuit of said repeater.

15. The combination of a solenoid, an armature controlled thereby, two relays therefor. contacts for each of said relays, one of said contacts being yibratile and connections whereby said contacts may be cooperatively or independently included in circuit with said solenoid.

16. The combination of a solenoid, an armature controlled thereby, two relays therefor, vibratile contacts for each of said relays, and means whereby only one ofsaid contacts may be effectively connected in circuit with said solenoid or whereby both of said contacts may be connected in series therewith.

17. The combination of a line, electromagnetic switches therefor having armatures, a repeater, a relay controlling said repeater, said armature at times connecting the solenoid of said relay in circuit with said line to the exclusion of said repeater and at other times operatively connecting said repeater in circuit with said line and relay.

18. The combination of a line, a plurality of electromagnetic switches therefor each having two armatures, a repeater, a. relay controlling said repeater, and circuit connections whereby said armaturcs at times connect the solenoid of said relay in circuit with said line, while leaving said repeater effectively disconnected therefrom, the armatures for one of said switches at times connecting the input side of said repeater to said line, the armatures for another of said switches at times connecting the output side of said repeater to said line.

19. The combination of two lines, a repeater adapted to be reversibly connected therebetween, and means comprising a relay forcontrolling the connection of said repeater to said lines, said relay being connected to the output side of said repeater for energization by amplified currents from said repeater.

20. The combination of two lines, a re peater adapted to be reversibly connected therebetween, a relay responsive to current approaching the repeater in either direction for controlling said repeater, and connections for energizing said relay with amplified current from said repeater.

21. A line, a repeater, means for operatively associating either the input side or the output side of said repeater with said line, and means responsive to amplified current from said repeater for controlling said first mentioned means.

22. A repeater system comprising two lines. a unidirectional current conducting amplifying means, switches for reversibly connecting said means to said lines, electromagnetic means for controlling said switches, and means, including a relay, for controlling said electromagnetic means and rendering said relay active at times in re sponse to amplified current from said amplitying means and at times in response to current incoming into said amplifying means.

23. A repeating system comprising two lines, a repeater, switch contacts for re versibly connecting said repeater to said lines, a plurality of alternating current relays for controlling said contacts, means in cluding connections for rendering one of? said relays active at times in response to amplified outgoing currents from said repeater and at times in response to currents incoming into said repeater, and means whereby one of said alternating current relays controls another.

24-. firm line seetions, a device to be conneeted tlierebetweem two re ays having windings and having arniat-nres disc0nnocted from each other and individual to said windings, means for connecting each of said windings between said device and one of said seeti. is, and means for causing one of said relays to establish the connection of said device to said line sections upon energization of said Winding of said one relay, and for cruising both of said relays to maintain the Connection of said device to said line sections wliile said windings are energized.

25. repeating systeln eoinprisii'ig a relayliaving vibratable Contact, a circuit to be controlled thereby, an auxiliary relay assisting said first-mentioned"relay; and 21 circuit comprising a rontaet operating continually \vliile repeating and Controlled by said'r'elays. e

26. A signaling system comprising a repeacer, a line, and means for reversibly eonneeting said repeater tliereto, said means including two sets of relatively movable contacts connected in series a solenoid in series With one set for holding said other set closed, and a solenoid responsive to alternating voltage on said linef0r operating said one set. v

In Witness whereof, I hereunto subscribe my name llllllS 14th day of Jan "nary, A. 11,1918.

EDGAR n. JOHNSON. 

